\documentclass{article}

\title{Basic operators}
\author{Dzmitry Lazerka}

\begin{document}

\newenvironment{wikimathdb}[1]{$$}{$$}


There are listed some basics that are hardcoded and have special
meaning.
\begin{enumerate}

\item
\begin{wikimathdb}{define}
\forall
\end{wikimathdb}

\item
\begin{wikimathdb}{define}
\exists
\end{wikimathdb}

\item
\begin{wikimathdb}{define}
=
\end{wikimathdb}

\item
\begin{wikimathdb}{define}
\neg
\end{wikimathdb}

\item
\begin{wikimathdb}{define}
\vee
\end{wikimathdb}


\end{enumerate}
\end{document}
